Midterm 1 MPS Flashcards
CH. 12 Recommended Probs
65a
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
45o
See CH.12 Rec. Problem Solutions
Give the HNMR chemical shift range typical of this FG
Iodoalkane
3.1-3.3 ppm
There is a “gap” at around 5.2 ppm in HNMR of alkenes where there is little to no activity. What is important about this “gap”?
This “gap” can be used to determine if an alkene is internal or terminal.
Since H’s attached to the terminal end of alkenes have a ppm shift of 4.6-5.2 ppm, you can assume that any signals to the left of this gap are H’s attached to the terminal end of an alkene (and thus, that the alkene is terminal).
Since H’s attached to the internal end of of alkenes have a ppm shift of 5.2-6.0 ppm, you can assume that any signals to the right of this gap are H’s attached to the internal end of an alkene.
CH. 11 Recommended Problems
30c
See CH. 11 Recommended Probs Key
SP2010 MT1
2i
See key
See Properties of Alkenes & pi-bonds
2
See key
SP2010 MT1
3g
See key
See NMR Practice Problems
15
See key
See NMR Practice Problems
23
See key
CH. 12 Recommended Probs
45e
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
64b
See CH.12 Rec. Problem Solutions
SP2013 MT1
7d
See solutions
Give the HNMR chemical shift range typical of this FG
Bromoalkane
3.4-3.6 ppm
CH. 11 Recommended Problems
30d
See CH. 11 Recommended Probs Key
Give the HNMR chemical shift range typical of this FG
Chloroalkane
3.6-3.8 ppm
CH. 12 Recommended Probs
49m
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
49o
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
60b
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
29d
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
37c
See CH. 11 Recommended Probs Key
Workshop Spectroscopy Practice #1-26
26
See key
Alicia PS #1
2c
See key
CH. 12 Recommended Probs
44b
See CH.12 Rec. Problem Solutions
Workshop Spectroscopy Practice #1-26
11
See key
CH. 12 Recommended Probs
57a
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
57b
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
37e
See CH. 11 Recommended Probs Key
See Properties of Alkenes & pi-bonds
1
See key
SP2013 MT1
2b
See solutions
What is the IR wavenumber range for Aromatics?
~3030 cm-1
What is the IR wavenumber range for -CC- Alkynes?
2100-2260 cm-1
Give the HNMR chemical shift range typical of this FG
Aromatic (Benzene-H)
6.5-9.5 ppm, usually 7-8 ppm
CH. 12 Recommended Probs
42a
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
46j
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
49c
See CH.12 Rec. Problem Solutions
See NMR Practice Problems
19
See key
CH. 12 Recommended Probs
64a
See CH.12 Rec. Problem Solutions
SP2010 MT1
1a
See key
SP2010 MT1
2h
See key
CH. 12 Recommended Probs
59b
See CH.12 Rec. Problem Solutions
Alcohol (-OH)
For the above FG, give the following:
- Wavenumber range
- Signal characteristics (strong, broad, sharp, etc)
- 3400-3650 cm-1
- Broad, strong
CH. 11 Recommended Problems
30i
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
55a
See CH. 11 Recommended Probs Key
CH. 12 Recommended Probs
41a
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
49f
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
53e
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
57c
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
66b
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
31b
See CH. 11 Recommended Probs Key
Alicia PS #1
4
See key
Give the HNMR chemical shift range typical of this FG
Next to aromatic (Benzene-CH)
2.2-2.5 ppm
Workshop Spectroscopy Practice #1-26
19
See key
CH. 12 Recommended Probs
45p
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
34
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
33
See CH. 11 Recommended Probs Key
Alicia PS #1
1b
See key
Alicia PS #1
2e
See key
SP2013 MT1
3b
See solutions
SP2013 MT1
3h
See solutions
SP2010 MT1
3e
See key
See Alkene Nomenclature PS
16
See key
CH. 11 Recommended Problems
41g
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
51a
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
29b
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
43
See CH. 11 Recommended Probs Key
Give the HNMR chemical shift range typical of this FG
Ester
3.5-4.5 ppm
SP2010 MT1
1f
See key
SP2010 MT1
9
See key
CH. 11 Recommended Problems
34c
See CH. 11 Recommended Probs Key
SP2010 MT1
7c
See key
Workshop Spectroscopy Practice #1-26
2
See key
CH. 11 Recommended Problems
51e
See CH. 11 Recommended Probs Key
See NMR Practice Problems
3
See key
CH. 12 Recommended Probs
66b
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
55c
See CH. 11 Recommended Probs Key
CH. 12 Recommended Probs
39
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
55b
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
51f
See CH. 11 Recommended Probs Key
Workshop Spectroscopy Practice #1-26
23
See key
CH. 12 Recommended Probs
40c
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
46d
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
34d
See CH. 11 Recommended Probs Key
Alicia PS #1
5
See key
See NMR Practice Problems
13
See key
CH. 12 Recommended Probs
58b
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
32a
See CH. 11 Recommended Probs Key
SP2013 MT1
3a
See solutions
SP2013 MT1
1f
See solutions
Give the HNMR chemical shift range typical of this FG
Ether/Alcohol
3.3-4.0 ppm
CH. 12 Recommended Probs
62
See CH.12 Rec. Problem Solutions
See NMR Practice Problems
22
See key
What is the IR wavenumber range for C=C benzene double bonds?
1660-2000 cm-1 and 1450-1600 cm-1
CH. 11 Recommended Problems
37d
See CH. 11 Recommended Probs Key
See Alkene Nomenclature PS
6
See key
See Alkene Nomenclature PS
12
See key
Give the coupling constant (J) and coupling pattern for geminal, trans-vicinal, cis-vicinal, allylic and alkane H-coupling.
- Geminal: 0-3 Hz; doublet (d)
- trans-vicinal: 10-18 Hz, usually ~16 Hz; doublet (d)
- cis-vicinal: 6-14 Hz, usually ~10 Hz; doublet (d)
- Allylic: 0-3 Hz; doublet (d), triplet (t) or quartet (q)
- Alkane: 4-10 Hz, usually ~7 Hz; doublet (d), triplet (t), or quartet (q)
CH. 12 Recommended Probs
50
See CH.12 Rec. Problem Solutions
SP2013 MT1
4
See solutions
Alicia PS #1
2b
See key
CH. 12 Recommended Probs
42c
See CH.12 Rec. Problem Solutions
See NMR Practice Problems
11
See key
Explain what the fragmentation obtained from mass spectrometry is, and why it is important?
- When atoms are deflected, they can create fragments of the compound.
- Some fragments are harder to make than others; but are usually made in specific ratios.
- These ratios of framentation can be used as a “fingerprint” for the compound, and are important in identifying unknown compounds.
CH. 12 Recommended Probs
59a
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
61a
See CH. 11 Recommended Probs Key
CH. 12 Recommended Probs
45a
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
27
See CH. 11 Recommended Probs Key
SP2010 MT1
3d
See key
CH. 12 Recommended Probs
42f
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
63c
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
63f
See CH. 11 Recommended Probs Key
SP2010 MT1
3c
See key
Workshop Spectroscopy Practice #1-26
8
See key
Alicia PS #1
3
See key
SP2013 MT1
1a
See solutions
CH. 11 Recommended Problems
30b
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
30e
See CH. 11 Recommended Probs Key
CH. 12 Recommended Probs
66f
See CH.12 Rec. Problem Solutions
See Alkene Nomenclature PS
18
See key
CH. 11 Recommended Problems
29c
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
41c
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
41f
See CH. 11 Recommended Probs Key
Amines
For the above FG, give the following:
- Wavenumber range
- Signal chracteristics
- 3250-3500 cm-1
- Broad, strong
CH. 12 Recommended Probs
35b
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
63a
See CH.12 Rec. Problem Solutions
See NMR Practice Problems
6
See key
CH. 11 Recommended Problems
29a
See CH. 11 Recommended Probs Key
CH. 11 Recommended Problems
34b
See CH. 11 Recommended Probs Key
SP2010 MT1
1b
See key
CH. 12 Recommended Probs
31
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
43c
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
42e
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
65e
See CH.12 Rec. Problem Solutions
SP2010 MT1
3b
See key
Alicia PS #1
1a
See key
CH. 12 Recommended Probs
40a
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
49a
See CH. 11 Recommended Probs Key
CH. 12 Recommended Probs
45m
See CH.12 Rec. Problem Solutions
See Alkene Nomenclature PS
7
See key
See Alkene Nomenclature PS
8
See key
CH. 12 Recommended Probs
57e
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
63b
See CH. 11 Recommended Probs Key
Alicia PS #1
2d
See key
What is the IR wavenumber range for Esters?
1735-1750 cm-1
CH. 12 Recommended Probs
46g
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
69
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
30f
See CH. 11 Recommended Probs Key
Explain how mass spectrometry can be used to detect the presence of isotopes.
- Since mass spec can determine the mass of compounds (and individual molecules) it can also determine the ratio of masses.
- By knowing the isotopic ratio of a compound in nature, you can compare to the relative ratios and masses of isotopes in compound to “match” the isotopes in the compound to the isotopes found in nature.
CH. 12 Recommended Probs
46b
See CH.12 Rec. Problem Solutions
CH. 12 Recommended Probs
37e
See CH.12 Rec. Problem Solutions
See NMR Practice Problems
5
See key
What is the IR wavenumber range for Nitriles?
2220-2260 cm-1
Workshop Spectroscopy Practice #1-26
7
See key
CH. 12 Recommended Probs
46l
See CH.12 Rec. Problem Solutions
What is the IR wavenumber range for the C=C bond of alkenes?
1620-1680 cm-1
SP2013 MT1
2a
See solutions
CH. 11 Recommended Problems
63
See CH. 11 Recommended Probs Key
Workshop Spectroscopy Practice #1-26
9
See key
What is the wavenumber range for Alkenes?
3050-3150 cm-1
See NMR Practice Problems
21
See key
SP2010 MT1
5
See key
Explain the difference in orientation between geminal, trans-vicinal, cis-vicinal, allylic, and alkane coupling in HNMR.
- Geminal: two H’s attached to the same C in a C=C bond.
- trans-vicinal: two H’s that are trans to each other across a C=C bond.
- cis-vicinal: two H’s that are cis to each other across a C=C bond.
- Allylic: one H attached to a C in a C=C bond, and one H attached to a C which is bonded to one side of the C=C bond (so a H attached to this –>C-C=C)\
- Alkane: two H’s on either side of a C-C bond.
CH. 12 Recommended Probs
57f
See CH.12 Rec. Problem Solutions
CH. 11 Recommended Problems
34a
See CH. 11 Recommended Probs Key
See Alkene Nomenclature PS
11
See key
SP2010 MT1
7b
See key
CH. 11 Recommended Problems
41h
See CH. 11 Recommended Probs Key